Construction control method and device for precast simple-supported beam embedded structure

Abstract

The application discloses a prefabricated simple-supported beam pre-embedded structure construction control method and device, relates to the prefabricated simple-supported box girder pre-embedded structure construction technical field, and through the combination of the establishment of a BIM three-dimensional model and a laser positioning system, a set of accurate positioning and real-time checking closed-loop control process based on a digital model is constructed, and the spatial positioning accuracy of the pre-embedded part is remarkably improved. The application of the rigid positioning device guarantees the relative rigid connection of the pre-embedded part and the steel reinforcement framework, reduces the deviation caused by vibration or operation in the construction process. The multi-stage three-dimensional coordinate verification and review means effectively avoid the accumulation of positioning errors, and improve the controllability of the construction quality. The dynamic real-time monitoring technology ensures the continuous quality monitoring and timely adjustment in the construction process, avoids the omission risk existing in the traditional section type review. The whole construction process realizes the seamless connection from the digital model to the accurate positioning on site, reduces the manual lofting error, and improves the efficiency and quality of the prefabricated simple-supported beam pre-embedded structure construction.

Description

Technical Field

[0001] This invention relates to the field of construction technology for precast simply supported box girder embedded structures, and particularly to a construction control method and device for precast simply supported beam embedded structures. Background Technology

[0002] With the continuous expansion of construction projects and the rapid development of engineering technology, precast simply supported box girders, as an important component of bridge structures, have become the mainstream structural form in modern bridge construction due to their advantages such as standardized manufacturing, fast construction speed, and easy quality control. In recent years, with the deepening application of information technology, Building Information Modeling (BIM) technology based on three-dimensional modeling has been gradually promoted, significantly improving the design and construction accuracy of precast simply supported box girders. At the same time, the application of high-precision measurement technologies such as laser positioning in civil engineering has gradually matured, providing technical support for the precise construction of embedded structures.

[0003] Currently, the construction of embedded components for precast simply supported box girders mainly relies on construction teams to position and install them using traditional construction drawings and on-site experience, employing methods such as manual layout and mechanical positioning. In practice, construction personnel typically use conventional measuring tools to verify the installation and fixing of embedded bolts and steel plates based on the design's two-dimensional drawings and on-site benchmarks. However, due to the complex construction environment, human error, and cumulative errors caused by multiple measurement conversions, it is difficult to achieve high-precision, real-time dynamic control of the embedded component's position. Furthermore, the verification during construction is mostly conducted in stages and sections, making it difficult to achieve continuous monitoring and timely adjustment of deviations throughout the entire process, thus affecting the installation accuracy and project quality of the embedded structure.

[0004] Although BIM technology and laser measurement equipment have been applied to the construction of precast beam embedded structures, current construction methods still have problems such as difficulty in ensuring positioning accuracy, insufficient real-time monitoring capabilities, and imperfect multi-stage verification processes. Summary of the Invention

[0005] The main objective of this invention is to propose a construction control method and device for precast simply supported beam embedded structures, aiming to solve the technical problems that still exist in the prior art, such as difficulty in ensuring positioning accuracy, insufficient real-time monitoring capabilities, and imperfect multi-stage verification processes.

[0006] To achieve the above objectives, in a first aspect, the present invention proposes a construction control method for precast simply supported beam embedded structures. The precast simply supported beam includes a box girder top slab reinforcement skeleton and at least one set of embedded parts disposed on the top slab reinforcement skeleton. The embedded parts set includes embedded bolts and embedded steel plates. The precast simply supported beam corresponds to a preset BIM three-dimensional model, and the BIM three-dimensional model contains the design coordinates of the embedded parts set. The construction control method for the precast simply supported beam embedded structure includes the following steps: Based on the BIM 3D model, a laser positioning system is used to project reference coordinates onto a preset jig. After the rigid positioning device is fixed to the template, the embedded parts are guided to align with the reference coordinates for initial positioning, and the positioning deviation is checked in real time by the laser positioning system. The laser positioning system is used to perform the first three-dimensional coordinate verification of the pre-embedded component group that has been fixed, and the corresponding verification results are obtained; wherein, the pre-embedded component group is rigidly fixed to the top plate steel reinforcement skeleton by the rigid positioning device; When the deviation value obtained by comparing the verification result with the BIM 3D model exceeds the first threshold, the fixed position of the embedded part group is adjusted in real time and the corresponding verification result is collected in real time until the verification result coincides with the BIM 3D model. The fixed rigid positioning device, the embedded parts group and the top plate steel reinforcement skeleton are hoisted into the mold as a whole. After entering the mold, the laser positioning system is used to project the secondary coordinate grid of the BIM three-dimensional model for secondary verification. When the deviation exceeds the second threshold, fine adjustment is made until the secondary coordinate grid coincides with the BIM three-dimensional model. Concrete pouring operations are carried out, and the laser positioning system is used in real time to compare and monitor the BIM model of the embedded parts group according to a preset cycle. The construction of the embedded structure is completed when the comparison and monitoring results meet the third threshold.

[0007] In one embodiment, the step of projecting reference coordinates onto a preset jig using a laser positioning system based on the BIM 3D model includes: A 3D model of the precast box girder is created in the BIM platform to obtain the BIM 3D model, wherein the BIM 3D model includes the design coordinates of the embedded component group. The design coordinates are then imported into the laser positioning system based on the BIM 3D model; wherein the laser positioning system includes a laser holographic projector and a laser plumb line. After the construction of the top slab reinforcement cage is completed, the rigid positioning device is hoisted to the corresponding position of the formwork, and the support leg pins of the base of the rigid positioning device are rigidly engaged with the reserved holes of the template. The laser holographic projector is activated to project a reference crosshair and coordinate grid onto the jig, guiding the pre-embedded bolts to align with the projection point. Simultaneously, the laser plumb bob is used to check the verticality deviation of the pre-embedded bolts, thus completing the reference coordinate projection operation.

[0008] In one embodiment, the rigid positioning device includes a multi-layer positioning plate and a horizontal bubble meter, wherein the multi-layer positioning plate is provided with guide holes for the pre-embedded bolts to pass through; The step of guiding the embedded parts assembly to align with the reference coordinates for initial positioning after fixing the rigid positioning device to the template, and checking the positioning deviation in real time through the laser positioning system, further includes: The pre-embedded bolts are passed through the guide holes of the multi-layer positioning plate for positioning. The bubble level is adjusted to center the bubble using the bubble leveling device, so that the rigid positioning device is in a horizontal state.

[0009] In one embodiment, before the steps of guiding the embedded part assembly to align with the reference coordinates for initial positioning after the rigid positioning device is snapped and fixed to the template, and checking the positioning deviation in real time through the laser positioning system, the method further includes: The embedded steel plate is embedded in the positioning groove of the top layer of the rigid positioning device, and the embedded steel plate is spot welded to the top of the embedded bolt. The embedded steel plate is connected to the main reinforcement of the top plate steel reinforcement skeleton through the U-shaped slot on the side of the rigid positioning device. The rigid module is formed by using both high-strength wire binding and auxiliary spot welding for double fixing.

[0010] In one embodiment, during the auxiliary spot welding fixing operation, the number of weld points for any bolt is not less than 4, and the welding current is not greater than 80A; The diameter of the high-strength binding wire is not less than 1.2 mm, and the construction torque is not less than 20 N·m.

[0011] In one embodiment, the step of performing concrete pouring operations, using the laser positioning system to perform real-time BIM model comparison and monitoring of the embedded component group according to a preset cycle, and completing the construction of the embedded structure when the comparison and monitoring results meet a third threshold includes: The concrete pouring operation is carried out by layered pouring; wherein the thickness of each layer of concrete is not greater than 300mm, the pouring speed is not greater than 0.5m³ / min, and the distance between the vibrator and the outer wall of the rigid positioning device is not less than 150mm. The laser positioning system is used to perform three-dimensional coordinate scanning of the embedded parts group through the reserved scanning window on the top plate of the rigid positioning device at a preset cycle, and the data obtained from the scanning is compared with the BIM model in real time. When the deviation in any direction exceeds the third threshold, the feeding is paused and the deviation is corrected by the fine-tuning screw of the rigid positioning device.

[0012] In one embodiment, the preset period is a comparison every ten minutes; the first threshold is 0.5 mm, the second threshold has a mid-spacing deviation of 0.3 mm and a height difference deviation of 0.2 mm, and the third threshold is 0.5 mm.

[0013] In one embodiment, quick-release pins are provided on both sides of the rigid positioning device; The steps of performing concrete pouring operations, using the laser positioning system to perform real-time BIM model comparison and monitoring of the embedded component group according to a preset cycle, and completing the construction of the embedded structure when the comparison and monitoring results meet a third threshold include: The rigid positioning device is pulled out as a whole by the quick-release pin, so that the embedded part group is permanently connected to the top plate steel reinforcement skeleton; After the rigid positioning device is removed, the laser positioning system is activated to perform a third BIM 3D model verification of the embedded parts group to ensure that the monitored structure meets the third threshold. When the precast simply supported box girder meets the preset strength, the formwork is removed.

[0014] In one embodiment, after the step of performing formwork removal when the precast simply supported box girder meets the preset strength, the method further includes: Using the scanning data from the total station combined with the laser positioning system, the current three-dimensional coordinates of the embedded parts group are compared and verified. The deviation data is then overlaid and compared with the BIM three-dimensional model to generate a visual deviation cloud map and archive it.

[0015] Based on the same technical concept, in a second aspect, the present invention also proposes a construction control device for prefabricated simply supported beam embedded structures, used to execute the construction control method for prefabricated simply supported beam embedded structures described in the first aspect.

[0016] The technical solution of this invention, by combining a BIM 3D model with a laser positioning system, constructs a closed-loop control process for accurate positioning and real-time verification based on a digital model, significantly improving the spatial positioning accuracy of embedded parts. The application of a rigid positioning device ensures a relatively rigid connection between the embedded parts and the reinforcing steel frame, reducing deviations caused by vibration or operation during construction. Multi-stage 3D coordinate verification and review effectively avoid the accumulation of positioning errors, improving the controllability of construction quality. Dynamic real-time monitoring technology ensures continuous quality monitoring and timely adjustments during construction, avoiding the omission risks inherent in traditional cross-sectional verification. The overall construction process achieves seamless integration from digital model to precise on-site positioning, greatly reducing manual layout errors and improving the efficiency and quality of precast simply supported beam embedded structure construction. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 The flowchart illustrates the construction control method for precast simply supported beam embedded structures provided by this invention.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] In the traditional construction of precast simply supported box girder embedded structures, the construction methods mainly rely on manual layout and mechanical positioning. Due to the complexity of the construction environment and the inherent errors of manual operation, it is difficult to achieve high-precision control of the embedded parts' positions. Multiple coordinate transformations during the measurement process introduce cumulative errors, causing deviations between the actual coordinates and design coordinates of the embedded parts. Furthermore, construction verification is mostly carried out in stages and sections, lacking continuous monitoring capabilities throughout the entire process, making it impossible to adjust deviations in a timely manner. This leads to a decrease in the installation accuracy of the embedded structure, affecting the overall structural integrity and the stability of the project quality.

[0024] For example, during the construction of precast simply supported box girders at a railway bridge prefabrication yard, workers positioned and installed the embedded bolts and steel plates according to two-dimensional construction drawings. After the top slab reinforcement cage was erected, conventional measuring tools were used for layout work. However, due to factors such as on-site vibration, temperature changes, and formwork deformation, the initial positioning required repeated manual verification. During each verification process, calibration deviations of the measuring instruments and reading errors by operators caused continuous fluctuations in the coordinate values. Ultimately, the position of the embedded steel plates deviated from the design requirements, making it impossible to accurately match the embedded bolts during subsequent support installation, necessitating multiple rework adjustments.

[0025] For this, please refer to Figure 1 This application proposes a construction control method for precast simply supported beam embedded structure. The precast simply supported beam includes a box girder top plate steel reinforcement skeleton and at least one set of embedded parts set on the top plate steel reinforcement skeleton. The embedded parts set includes embedded bolts and embedded steel plates. The precast simply supported beam corresponds to a preset BIM three-dimensional model. The BIM three-dimensional model contains the design coordinates of the embedded parts set. The construction control method for the precast simply supported beam embedded structure includes the following steps: S100. Based on the BIM three-dimensional model, a laser positioning system is used to project reference coordinates onto a preset jig. S200. After the rigid positioning device is fixed to the template, guide the embedded parts group to align with the reference coordinates for initial positioning, and check the positioning deviation in real time through the laser positioning system. S300. The laser positioning system is used to perform the first three-dimensional coordinate verification of the pre-embedded part group that has been fixed, and the corresponding verification results are obtained; wherein, the pre-embedded part group is rigidly fixed to the top plate steel reinforcement skeleton by the rigid positioning device; S400. When the deviation value obtained by comparing the verification result with the BIM three-dimensional model exceeds the first threshold, the fixed position of the embedded part group is adjusted in real time and the corresponding verification result is collected in real time until the verification result coincides with the BIM three-dimensional model. S500. The fixed rigid positioning device, the embedded parts group and the top plate steel reinforcement skeleton are hoisted into the mold as a whole. After entering the mold, the laser positioning system is used to project the secondary coordinate grid of the BIM three-dimensional model for secondary verification. When the deviation exceeds the second threshold, fine adjustment is made until the secondary coordinate grid coincides with the BIM three-dimensional model. S600, Concrete pouring operation is carried out, and the laser positioning system is used in real time to compare and monitor the BIM model of the embedded parts group according to the preset cycle. When the comparison and monitoring results meet the third threshold, the construction operation of the embedded structure is completed.

[0026] Specifically, before implementing this method, a precast simply supported beam needs to be prepared. This beam includes a box girder top slab reinforcement cage and at least one set of embedded parts mounted on the top slab reinforcement cage. This set of embedded parts consists of embedded bolts and embedded steel plates. Furthermore, this precast simply supported beam corresponds to a pre-set BIM 3D model, which contains the design coordinates of the embedded parts set. For example, in traditional construction preparation, the embedded parts set may only be roughly positioned based on 2D drawings, and its design coordinates are usually recorded in paper form or simple spreadsheets, lacking 3D spatial information. This may lead to a significant amount of manual conversion and calculation required for subsequent positioning.

[0027] The first step of this method is to project reference coordinates onto a pre-set jig using a laser positioning system based on the BIM 3D model. In practice, the 3D model of the precast simply supported beam can be loaded into the BIM software first, and the precise design coordinates of the embedded parts can be extracted from it. Then, this coordinate data is imported into the laser positioning system. The laser positioning system can take various forms. For example, it can be a laser rangefinder with coordinate input and projection functions, where the design coordinate points are manually projected one by one onto the jig to form a series of discrete reference points. Another approach is to use a laser device with scanning capabilities to scan the jig surface and, in conjunction with the BIM model data, mark key reference points or lines on the jig.

[0028] Next, after the rigid positioning device is fixed to the template, the embedded part assembly is guided to align with the reference coordinates for initial positioning, and the positioning deviation is checked in real time using the laser positioning system. During the initial positioning stage, the embedded part assembly can be roughly placed near the design location. The rigid positioning device can be a simple metal frame with holes or clamps for fixing the embedded part assembly. This device is connected and fixed to the template using bolts or clamps. When guiding the embedded part assembly to align with the reference coordinates, construction personnel can manually adjust the position of the embedded part assembly while simultaneously using the laser positioning system for real-time measurement. For example, the laser positioning system can continuously emit a laser beam; when the embedded part assembly moves to the target position, the laser beam will illuminate a specific marked point on the embedded part assembly, and the system will provide feedback on its current coordinates. Based on the feedback deviation information, construction personnel continuously fine-tune the position of the embedded part assembly until it essentially coincides with the reference coordinates.

[0029] Subsequently, the laser positioning system was used to perform the first three-dimensional coordinate verification of the pre-embedded component assembly, which had already undergone fixing, and the corresponding verification results were obtained. At this stage, the pre-embedded component assembly was rigidly fixed to the top slab reinforcement cage using the rigid positioning device. The initial verification operation used the laser positioning system to measure the three-dimensional coordinates of several key points of the pre-embedded component assembly, such as the top center point of the pre-embedded bolts and the four corner points of the pre-embedded steel plates. These measurement data were recorded as verification results. In traditional construction, this verification step might rely solely on two-dimensional measurements using a measuring tape and plumb line, making it difficult to obtain accurate three-dimensional coordinate information, and the verification process is time-consuming.

[0030] When the deviation between the verification result and the BIM 3D model exceeds the first threshold, the fixed position of the embedded part group needs to be adjusted in real time, and the corresponding verification result needs to be collected in real time until the verification result coincides with the BIM 3D model. If the initial verification finds the deviation to be too large, the construction personnel need to loosen the fixing method of the embedded part group and manually or with the help of simple tools adjust its position. After adjustment, the 3D coordinate measurement is performed again using a laser positioning system and compared with the BIM model. This adjustment-verification-comparison cycle will continue until the deviation between the actual position of the embedded part group and the design position in the BIM model meets the preset first threshold requirement, that is, the two basically coincide.

[0031] Next, the fixed rigid positioning device, the embedded part assembly, and the top slab reinforcement cage are hoisted into the formwork as a whole. After placement, the laser positioning system projects a secondary coordinate grid of the BIM 3D model for secondary verification. If the deviation exceeds a second threshold, fine-tuning is performed until the secondary coordinate grid coincides with the BIM 3D model. At this stage, the embedded part assembly, rigid positioning device, and reinforcement cage have formed a stable whole and can be hoisted as a unit. After placement, due to the hoisting process or formwork deformation, the overall position of the embedded part assembly may shift slightly. At this time, the laser positioning system can be reactivated to project the preset secondary coordinate grid in the BIM model. Construction personnel check the alignment of the embedded part assembly with the projected grid visually or with auxiliary measuring tools. If the deviation exceeds the second threshold, the entire rigid module needs to be fine-tuned, for example, by using adjustment mechanisms or shims on the formwork, until it is completely aligned with the secondary coordinate grid.

[0032] Finally, concrete pouring is carried out, and the laser positioning system is used in real time to monitor and compare the embedded parts group with the BIM model at preset intervals. The construction of the embedded structure is completed when the monitoring results meet the third threshold. During the concrete pouring process, the position of the embedded parts group may shift due to factors such as concrete fluidity, vibration, and temperature changes. To ensure final accuracy, the laser positioning system automatically scans or measures the embedded parts group at preset time intervals, such as every certain period, and compares its current position data with the BIM model in real time. If any deviation in any direction exceeds the third threshold, the pouring operation may be temporarily interrupted so that construction personnel can make emergency corrections to the embedded parts group. When the entire pouring process is completed and the deviations in all monitoring periods meet the third threshold requirements, the construction of the embedded structure is considered complete.

[0033] In this embodiment, by combining a BIM 3D model with a laser positioning system, a closed-loop control process for accurate positioning and real-time verification based on the digital model was constructed, significantly improving the spatial positioning accuracy of the embedded parts. The application of a rigid positioning device ensures a relatively rigid connection between the embedded parts and the reinforcing steel frame, reducing deviations caused by vibration or operation during construction. Multi-stage 3D coordinate verification and review methods effectively avoid the accumulation of positioning errors and improve the controllability of construction quality. Dynamic real-time monitoring technology ensures continuous quality monitoring and timely adjustments during construction, avoiding the omission risks inherent in traditional cross-sectional verification. The overall construction process achieves seamless integration from the digital model to precise on-site positioning, greatly reducing manual layout errors and improving the efficiency and quality of precast simply supported beam embedded structure construction.

[0034] In one embodiment, step S100 includes: S110. Establish a three-dimensional model of the precast box girder in the BIM platform to obtain the BIM three-dimensional model; wherein, the BIM three-dimensional model includes the design coordinates of the embedded parts group; S120, and import the design coordinates into the laser positioning system based on the BIM 3D model; wherein, the laser positioning system includes a laser holographic projector and a laser plumb line; S130. After the construction of the top slab reinforcement cage is completed, the rigid positioning device is hoisted to the corresponding position of the formwork, and the support leg pin of the base of the rigid positioning device is rigidly engaged with the reserved hole of the template. S140. Activate the laser holographic projector to project a reference crosshair and coordinate grid onto the jig frame, guide the pre-embedded bolts to align with the projection point, and simultaneously use the laser plumb bob to check the verticality deviation of the pre-embedded bolts to complete the reference coordinate projection operation.

[0035] The process involves creating a 3D model of the precast box girder on a BIM platform, obtaining the BIM 3D model, which includes the design coordinates of the embedded component assembly. This step aims to create a digital model of the precast box girder containing precise design location information for the embedded component assembly. The BIM platform can be a professional building information modeling software, such as Revit, Tekla Structures, or Bentley Micro Station, which supports 3D modeling, information integration, and data management. By establishing the 3D model, the geometry, dimensions, and locations of the precast box girder and its internal embedded component assembly can be accurately defined and visualized, providing a data foundation for subsequent construction control.

[0036] The design coordinates are imported into the laser positioning system based on the BIM 3D model. This step involves transmitting the precise design coordinate data of the embedded parts group in the BIM model to the laser positioning system as the basis for on-site construction positioning. Import methods can include via a data interface (such as API), file format conversion (such as IFC, DWG, etc.), or direct input into the control software of the laser positioning system. This ensures a high degree of consistency between on-site positioning and the design model, avoiding errors that may be introduced by manual coordinate conversion.

[0037] The laser positioning system includes a laser holographic projector and a laser plumb line, which are key tools for achieving high-precision on-site positioning. The laser holographic projector accurately projects the design coordinates from the BIM model onto the construction site jig as visible laser lines or a dot matrix, providing intuitive visual guidance for the initial positioning of the embedded parts. The laser plumb line is used to accurately measure and verify the verticality of the embedded bolts, ensuring their installation posture meets design requirements and preventing installation deviations caused by tilting.

[0038] After the top slab reinforcement cage is constructed, the rigid positioning device is hoisted to the corresponding position on the formwork. The support legs of the rigid positioning device's base are rigidly engaged with the pre-drilled holes in the formwork. This step describes the installation method of the rigid positioning device. After the top slab reinforcement cage is completed, the rigid positioning device is precisely placed in the predetermined position on the formwork. The support legs of its base engage with the pre-drilled holes in the formwork, forming a stable connection. This rigid engagement method ensures the positional stability of the positioning device during subsequent operations, avoiding positioning errors caused by device shaking or displacement.

[0039] The laser holographic projector is activated to project reference crosshairs and coordinate grids onto the jig, guiding the embedded bolts to align with the projection points. This step utilizes the laser holographic projector to convert the design coordinates in the BIM model into visible references on-site. The reference crosshairs and coordinate grids provide precise positioning references, allowing construction personnel to visually align the embedded bolts with the preset projection points based on these projection lines and grids, thereby achieving initial precise placement of the embedded component assembly.

[0040] Simultaneously, the laser plumb line is used to check the verticality deviation of the embedded bolts to complete the reference coordinate projection operation. While the embedded bolts are initially positioned by aligning with the projection point, the laser plumb line is used to monitor and check the verticality of the embedded bolts in real time. Through the laser plumb line, the tilt deviation of the embedded bolts can be detected and corrected in a timely manner to ensure their vertical installation, thereby guaranteeing the overall installation accuracy of the embedded component assembly and the reliability of subsequent connections.

[0041] In this embodiment, a series of optimization measures are proposed to address the accuracy and efficiency issues in the reference coordinate projection stage of the precast simply supported beam embedded structure construction control method. First, a three-dimensional model of the precast box girder is established in the BIM platform, and the design coordinates of the embedded component group are accurately obtained, providing a high-precision digital reference for the entire construction process. Subsequently, these design coordinates are seamlessly imported into a laser positioning system composed of a laser holographic projector and a laser plumb line. After the top slab reinforcement skeleton is constructed, the rigid positioning device is precisely hoisted and rigidly engaged with the template on the jig, ensuring the stability of the positioning device itself. Next, the laser holographic projector is activated, accurately projecting the reference crosshairs and coordinate grid from the BIM model onto the jig, providing intuitive and high-precision visual guidance for the initial alignment of the embedded bolts. During this process, the laser plumb line works synchronously, checking the verticality deviation of the embedded bolts in real time to ensure the accuracy of their installation posture. In this way, this application combines the precise data of the BIM model with on-site laser positioning technology, realizing the digitalization, visualization and high-precision control of the reference coordinate projection operation of the embedded parts group, which significantly improves the accuracy and efficiency of the initial positioning of the embedded parts group, lays a solid foundation for subsequent precise positioning and fixing, and effectively avoids the error accumulation that may be caused by traditional manual measurement.

[0042] As a specific implementation method, when constructing precast simply supported beam embedded structures, a detailed 3D model of the precast box girder is first created in a BIM platform, such as using Autodesk Revit software. In this model, the geometric position and design coordinates of each group of embedded parts (including embedded bolts and embedded steel plates) are precisely defined. After modeling is completed, the BIM model data containing the design coordinates of the embedded parts is exported to a format recognizable by the laser positioning system, such as point cloud data or CAD files, and imported into the laser positioning system control software used on site. This laser positioning system can employ integrated laser holographic projectors and laser plumb lines from brands such as Leica or Trimble. After the top slab reinforcement skeleton is constructed, the pre-fabricated rigid positioning device is hoisted to the corresponding area of ​​the embedded parts group on the jig using lifting equipment. The rigid positioning device features a base with retractable legs, each ending in a locking pin. These pins engage with pre-drilled holes on the template that match the device's dimensions, creating a secure, rigid connection between the device and the template. Next, the laser holographic projector in the laser positioning system projects bright red laser crosshairs and a fine coordinate grid onto the template surface. These projection lines precisely correspond to the center positions of the pre-embedded bolts in the BIM model. Based on these projection lines, construction workers initially place the pre-embedded bolts onto the projection points. Simultaneously, a laser plumb bob emits a vertical laser beam, displaying the verticality deviation of the pre-embedded bolts in real time. Workers can then fine-tune the bolts' orientation based on the plumb bob's feedback until their verticality meets the requirements, thus completing the precise projection of the reference coordinates and the initial positioning of the pre-embedded bolts.

[0043] Through the above technical solution, this application effectively solves the problems of difficulty in ensuring accuracy and low efficiency in the projection of reference coordinates for embedded parts. By deeply integrating the BIM 3D model with the laser positioning system, the digital import of design coordinates and precise on-site visualization projection are achieved, greatly improving the accuracy of the initial positioning of the embedded parts. The intuitive reference crosshairs and coordinate grid provided by the laser holographic projector enable construction personnel to quickly and accurately align the embedded bolts, reducing the time spent on manual measurement and repeated verification. Simultaneously, the synchronous verification function of the laser plumb bob ensures the verticality of the embedded bolts, avoiding installation deviations caused by tilting, thereby guaranteeing the overall installation quality of the embedded parts assembly. This method not only improves construction efficiency but also ensures the installation accuracy of the embedded parts assembly from the source, providing a reliable foundation for subsequent concrete pouring and structural connection, and significantly reducing construction errors and rework rates. In one embodiment, the rigid positioning device includes a multi-layer positioning plate and a horizontal bubble meter, wherein the multi-layer positioning plate is provided with guide holes for the pre-embedded bolts to pass through; Step S200 further includes: S210. Pass the pre-embedded bolt through the guide hole of the multi-layer positioning plate to perform positioning operation; S220. Use the leveling bubble meter to help level the bubble until it is centered, so that the rigid positioning device is in a horizontal state.

[0044] The multi-layer positioning plate is a plate-like component with a multi-layered structure, featuring guide holes for precisely guiding and fixing pre-embedded bolts. This multi-layer positioning plate can be made of metal, high-strength plastic, or other composite materials. Its function is to provide multi-dimensional physical constraints for the pre-embedded bolts, ensuring their verticality and planar position accuracy during the initial positioning stage. For example, the multi-layer positioning plate can be designed with two or three layers, with the guide holes on each layer precisely machined to accommodate the diameter and spacing of the pre-embedded bolts. The bubble level is a measuring tool used to detect and indicate the horizontal state of an object. It can be a traditional glass tube bubble level or an electronic level sensor integrated into a rigid positioning device. Its function is to assist construction personnel in adjusting the rigid positioning device to a precise horizontal state, thereby ensuring the horizontality of the pre-embedded component assembly fixed by the device in space and avoiding installation deviations caused by device tilt. The guide holes are precision holes set in the multi-layer positioning plate, their size and shape matching the shape of the pre-embedded bolts, allowing the pre-embedded bolts to pass through and be precisely guided. The guide hole serves to provide physical constraints, ensuring that the embedded bolt is accurately guided to the preset position and maintains its perpendicularity when passing through. For example, the guide hole can be designed as a circular hole slightly larger than the diameter of the embedded bolt, or, for ease of installation and fine-tuning, as an elliptical or slotted hole with certain tolerances. Passing the embedded bolt through the guide hole of the multi-layer positioning plate for positioning refers to inserting the embedded bolt one by one or in batches into the guide hole on the multi-layer positioning plate after the rigid positioning device is snapped and fixed to the template. This step utilizes the physical constraint of the guide hole to perform preliminary, high-precision position and perpendicularity calibration of the embedded bolt, bringing it close to the design coordinates of the BIM 3D model in space. This significantly reduces errors from manual positioning and improves the efficiency and accuracy of initial positioning. Using the bubble level to assist in leveling until the bubble is centered, ensuring the rigid positioning device is horizontal, refers to fine-tuning the rigid positioning device after the embedded bolt passes through the guide hole by observing the bubble level indicator until the bubble is centered on the indicator. The purpose of this step is to ensure that the entire rigid positioning device is flat in the horizontal direction, thereby ensuring that all the embedded parts it fixes are on the same horizontal plane, avoiding height differences or tilting of the embedded parts due to device tilting, and further improving the installation accuracy and overall quality of the embedded parts.

[0045] In this embodiment, a more precise initial positioning and leveling mechanism is formed by introducing multi-layer positioning plates and a leveling bubble level into the rigid positioning device. Specifically, after the rigid positioning device is snapped and fixed onto the template, the embedded bolts are guided through the pre-set guide holes on the multi-layer positioning plates. The multi-layer positioning plates provide multi-dimensional physical constraints on the embedded bolts through their precise guide holes, ensuring that each embedded bolt achieves high verticality and planar position accuracy in the initial stage, thereby effectively avoiding deviations caused by inaccurate manual positioning. At the same time, the leveling bubble level serves as an intuitive leveling indicator, assisting construction personnel in real-time leveling of the rigid positioning device. By observing the bubble level's indication, construction personnel can precisely adjust the posture of the rigid positioning device until it reaches a completely level state. This mechanism, combining physical guidance and real-time level calibration, allows the position and posture of the embedded component assembly to be preset and calibrated with high precision before rigid fixing to the top slab reinforcement skeleton. Compared to relying solely on laser positioning systems for real-time verification, this solution provides more robust and precise physical support and calibration during the initial positioning stage, significantly reducing the workload of subsequent verification and adjustments. It also ensures the installation quality of the embedded parts from the source, laying a solid foundation for subsequent concrete pouring and overall module hoisting.

[0046] In one embodiment, prior to step S200, the method further includes: A100. Embed the pre-embedded steel plate into the positioning groove of the top layer of the rigid positioning device, and spot weld the pre-embedded steel plate to the top of the pre-embedded bolt. A200. The embedded steel plate is connected to the main reinforcement of the top plate steel reinforcement skeleton through the U-shaped slot on the side of the rigid positioning device. The A300 uses a combination of high-strength wire binding and auxiliary spot welding for dual fixing to form the rigid module.

[0047] Specifically, the embedded steel plate is inserted into the positioning groove of the top layer of the rigid positioning device and then spot-welded to the top of the embedded bolt. This aims to ensure the relative positional accuracy between the components within the embedded assembly by precisely fixing the embedded steel plate to the rigid positioning device and further connecting it to the embedded bolt. Inserting the embedded steel plate into the positioning groove of the top layer of the rigid positioning device utilizes the geometry of the groove to limit the embedded steel plate's movement in the horizontal direction. Spot-welding the embedded steel plate to the top of the embedded bolt provides a stable connection in the vertical direction, ensuring that the embedded bolt and embedded steel plate form a stable whole. Alternatively, besides spot welding, threaded connections, riveting, or adhesive bonding can be used to fix the embedded steel plate to the top of the embedded bolt, or the self-locking structure of the positioning groove can be used to embed and fix the embedded steel plate.

[0048] In this embodiment, the embedded steel plate is connected to the main reinforcement bars of the top slab reinforcement cage via a U-shaped groove on the side of the rigid positioning device. This describes the connection method between the embedded component assembly and the top slab reinforcement cage, aiming to transfer and lock the positioning accuracy of the embedded component assembly to the reinforcement cage. The U-shaped groove design on the side of the rigid positioning device allows the embedded steel plate to be mechanically connected to the main reinforcement bars of the top slab reinforcement cage through this groove. This connection method utilizes the clamping effect of the U-shaped groove on the main reinforcement bars, forming a structural interlock, thereby effectively fixing the embedded steel plate (and thus the entire embedded component assembly) to the main reinforcement bars of the reinforcement cage, preventing relative displacement during construction. Alternatively, in addition to the U-shaped groove, C-type clamps, bolt clamping mechanisms, or welded connectors can also be used to connect the embedded steel plate to the main reinforcement bars of the top slab reinforcement cage.

[0049] A dual-fixation method, employing both high-strength binding wire and auxiliary spot welding, is used to form a rigid module. This combination of two different fixing methods significantly enhances the connection strength and stability between the embedded component assembly and the top slab reinforcement cage, resulting in a rigid module that is less prone to deformation during subsequent hoisting and pouring. The high-strength binding wire provides a flexible yet strong binding force, tightly securing the embedded component assembly to the reinforcement cage and resisting vibration and impact. Auxiliary spot welding provides rigid, permanent connection points, further limiting relative displacement and enhancing the overall structure's shear and tensile strength. The combination of these two methods creates a complementary fixing effect, ensuring the precise positioning of the embedded component assembly remains intact even in complex construction environments. Alternatively, in addition to high-strength binding wire and auxiliary spot welding, a combination of bolted connections and welding, or the use of specially designed reinforcing steel connectors combined with binding, can also be used for dual-fixation.

[0050] In one embodiment, during the auxiliary spot welding fixing operation, the number of weld points for any bolt is not less than 4, and the welding current is not greater than 80A; The diameter of the high-strength binding wire is not less than 1.2 mm, and the construction torque is not less than 20 N·m.

[0051] Specifically, during auxiliary spot welding for fixing, the number of weld points for any bolt shall not be less than four. This stipulates that during the auxiliary spot welding process, there should be at least four weld points at the connection between each embedded bolt and the embedded steel plate. This aims to ensure the strength of the connection by dispersing stress and improving the reliability of the connection through increasing the number of weld points. For example, manual spot welding can be used to ensure that at least four independent weld points are formed around each bolt, or automated welding equipment can be used to precisely control the number of weld points. The welding current shall not exceed 80A, which limits the maximum welding current during auxiliary spot welding. The purpose of controlling the welding current is to avoid excessive heat input due to excessive current, which may adversely affect the material properties of the reinforcing steel frame or cause unnecessary deformation. For example, a welding machine with precise current adjustment function can be selected, and the current can be set below 80A according to the material characteristics and welding requirements to achieve effective local connection without damaging the overall structure. The diameter of the high-strength binding wire shall not be less than 1.2mm, which specifies the minimum diameter of the high-strength binding wire used for fixing. The diameter of the binding wire is a key parameter affecting its tensile strength and stiffness; a larger diameter generally means higher strength and provides more reliable mechanical fastening. For example, high-strength steel wire binding wire with a diameter of 1.2mm or larger can be selected from the market, or higher-strength binding wire can be customized according to project requirements. The construction torque should not be less than 20 N·m, which specifies the minimum torque to be applied when tightening high-strength binding wire. Applying sufficient torque ensures that the binding wire is fully tightened, thereby generating sufficient preload between the embedded parts and the top slab reinforcement skeleton, forming a tight frictional and mechanical connection, effectively preventing relative displacement. For example, an electric binding wire gun or torque wrench with a torque setting function can be used, set to a torque value of not less than 20 N·m to ensure the binding wire is tightened effectively.

[0052] In this embodiment, by precisely defining the key parameters of the auxiliary spot welding and high-strength tie wire fixing operations, the reliability and stability of the connection between the embedded parts assembly and the top slab reinforcement cage are ensured. Specifically, in the auxiliary spot welding operation, it is stipulated that the number of weld points for any bolt shall not be less than 4. This increases the contact area and connection strength between the weld points and the bolts, effectively dispersing stress and thus improving the firmness of the spot welding fixation. At the same time, the welding current is limited to no more than 80A to avoid thermal damage or material performance degradation caused by excessive current, ensuring the quality of spot welding and the integrity of the reinforcement cage. In addition, for the high-strength tie wire fixing, its diameter is required to be no less than 1.2mm, ensuring that the tie wire itself has sufficient tensile strength and stiffness to withstand various loads during construction. Combined with the requirement that the construction torque is no less than 20N·m, the tie wire can be tightly wrapped and fixed to the embedded parts assembly and the reinforcement cage, generating sufficient preload, thereby forming a highly stable rigid module. The synergistic effect of these parameters significantly improves the positional accuracy and displacement resistance of the embedded parts assembly before and after concrete pouring, effectively solving the displacement problem of the embedded parts assembly caused by insecure fixing.

[0053] In one embodiment, step S600 includes: S610. Concrete pouring is carried out by layered pouring; wherein the thickness of each layer of concrete is not greater than 300mm, the pouring speed is not greater than 0.5m³ / min, and the distance between the vibrator and the outer wall of the rigid positioning device is not less than 150mm. S620. Using the laser positioning system, the embedded parts group is scanned in three dimensions through the reserved scanning window on the top plate of the rigid positioning device at a preset cycle, and the data obtained by scanning is compared with the BIM model in real time. S630. When the deviation in any direction exceeds the third threshold, the feeding is paused and the deviation is corrected by the fine-tuning screw of the rigid positioning device.

[0054] Specifically, the layered pouring method for concrete pouring aims to effectively reduce the instantaneous water pressure and impact force generated by a single pour by pouring concrete in multiple layers, thereby minimizing disturbance to the embedded component assembly. For example, the pouring volume can be manually controlled, or the volume of each pour can be precisely controlled by automated equipment. The thickness of each layer of concrete should not exceed 300mm. This specific limitation on layered pouring aims to further refine the control of the pouring process. Limiting the thickness of each layer to a smaller range more effectively disperses the self-weight pressure of the concrete, avoids local stress concentration, and thus better protects the positioning accuracy of the embedded component assembly. For example, construction workers can control this visually using a ruler, or use a laser rangefinder to assist in monitoring the pouring thickness. The discharge speed should not exceed 0.5m³ / min. This parameter controls the concrete delivery rate. Limiting the discharge speed reduces the impact of concrete on the embedded component assembly, reduces the speed of concrete accumulation and flow within the mold, thereby reducing the thrust generated by rapid concrete flow and further stabilizing the position of the embedded component assembly. For example, this can be achieved by adjusting the output power of the concrete pump or manually controlling the discharge valve. The distance between the vibrator and the outer wall of the rigid positioning device should be no less than 150mm. Vibration is an essential step in concrete pouring, but excessively close vibration may cause direct impact or severe vibration to the embedded parts assembly. Setting a minimum distance between the vibrator and the outer wall of the rigid positioning device aims to avoid direct contact or excessive influence of the vibrator on the rigid positioning device, thereby protecting the positioning accuracy of the embedded parts assembly. For example, construction workers must strictly follow operating procedures during vibration and can use vibrators with distance markings. A laser positioning system is used to perform three-dimensional coordinate scanning of the embedded parts assembly through a reserved scanning window on the top plate of the rigid positioning device at a preset cycle. During concrete pouring, the existing laser positioning system is used to monitor the embedded parts assembly in real time. The reserved scanning window on the top plate of the rigid positioning device allows the laser positioning system to penetrate the window and perform three-dimensional coordinate scanning of the embedded parts assembly without interfering with the pouring operation, obtaining its current position information. For example, the laser positioning system can be configured to automatic scanning mode, scanning key points of the embedded parts assembly at preset time intervals. The scanned data is compared with the BIM model in real time. The 3D coordinate data of the embedded parts obtained in real time is compared with the preset design coordinates in the BIM 3D model. This real-time comparison can quickly detect whether the embedded parts have shifted or deformed during the pouring process and quantify their deviation value. For example, through a dedicated software module, the scanned data is imported into the BIM platform, and coordinate matching and deviation calculation are performed automatically. When the deviation in any direction exceeds the third threshold, the material feeding is paused and the fine-tuning screw of the rigid positioning device is used for correction. This is a key feedback control mechanism. Once the real-time comparison finds that the deviation of the embedded parts in any of the X, Y, or Z directions exceeds the preset third threshold, the concrete feeding is immediately stopped to prevent the deviation from expanding further.Subsequently, the embedded parts assembly is finely adjusted using a fine-tuning screw integrated into the rigid positioning device to correct its position back to the design requirements. For example, the fine-tuning screw can be designed as a manual adjustment mechanism with graduations, or it can be linked with an automated system to achieve remote and precise adjustment.

[0055] In this embodiment, during the concrete pouring stage, a series of refined control measures and a real-time monitoring and correction mechanism are introduced to ensure high-precision positioning of the embedded component assembly throughout the pouring process. First, a layered pouring method is adopted, with strict control over the thickness and pouring speed of each layer of concrete, reducing the potential impact and displacement of the embedded component assembly caused by concrete flow and pressure. Simultaneously, by limiting the distance between the vibrator and the outer wall of the rigid positioning device, direct disturbance to the embedded component assembly during vibration is effectively avoided. Based on these physical control measures, this application further utilizes a laser positioning system to perform real-time scanning of the embedded component assembly's three-dimensional coordinates through a pre-reserved scanning window on the top plate of the rigid positioning device, according to a preset cycle. These real-time acquired coordinate data are then compared instantly with the design coordinates in the BIM three-dimensional model, enabling accurate and rapid detection of any deviations that may occur in any direction during the pouring process. Once a deviation in any direction exceeds a preset third threshold, the system immediately pauses concrete pouring to prevent further accumulation of deviation. At this point, construction workers can use the fine-tuning screws integrated on the rigid positioning device to make precise physical adjustments to the embedded parts assembly, correcting its position to meet design requirements. This closed-loop control strategy of "preventive control + real-time monitoring + immediate correction" ensures that the embedded parts assembly remains within a very high precision range throughout the dynamic and easily disturbed construction process of concrete pouring, effectively solving the technical problem of easy displacement of the embedded parts assembly during concrete pouring.

[0056] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the protection scope of the present invention.

Claims

1. A construction control method for precast simply supported beam embedded structures, characterized in that, The precast simply supported beam includes a box girder top slab reinforcement skeleton and at least one set of embedded parts disposed on the top slab reinforcement skeleton. The embedded parts set includes embedded bolts and embedded steel plates. The precast simply supported beam corresponds to a preset BIM three-dimensional model, and the BIM three-dimensional model contains the design coordinates of the embedded parts set. The construction control method for the precast simply supported beam embedded structure includes the following steps: Based on the BIM 3D model, a laser positioning system is used to project reference coordinates onto a preset jig. After the rigid positioning device is fixed to the template, the embedded parts are guided to align with the reference coordinates for initial positioning, and the positioning deviation is checked in real time by the laser positioning system. The laser positioning system is used to perform the first three-dimensional coordinate verification of the pre-embedded component group that has been fixed, and the corresponding verification results are obtained; wherein, the pre-embedded component group is rigidly fixed to the top plate steel reinforcement skeleton by the rigid positioning device; When the deviation value obtained by comparing the verification result with the BIM 3D model exceeds the first threshold, the fixed position of the embedded part group is adjusted in real time and the corresponding verification result is collected in real time until the verification result coincides with the BIM 3D model. The fixed rigid positioning device, the embedded parts group and the top plate steel reinforcement skeleton are hoisted into the mold as a whole. After entering the mold, the laser positioning system is used to project the secondary coordinate grid of the BIM three-dimensional model for secondary verification. When the deviation exceeds the second threshold, fine adjustment is made until the secondary coordinate grid coincides with the BIM three-dimensional model. Concrete pouring operations are carried out, and the laser positioning system is used in real time to compare and monitor the BIM model of the embedded parts group according to a preset cycle. The construction of the embedded structure is completed when the comparison and monitoring results meet the third threshold.

2. The construction control method for precast simply supported beam embedded structures as described in claim 1, characterized in that, The step of projecting reference coordinates onto a preset jig using a laser positioning system based on the BIM 3D model includes: A 3D model of the precast box girder is created in the BIM platform to obtain the BIM 3D model, wherein the BIM 3D model includes the design coordinates of the embedded component group. The design coordinates are then imported into the laser positioning system based on the BIM 3D model; wherein the laser positioning system includes a laser holographic projector and a laser plumb line. After the construction of the top slab reinforcement cage is completed, the rigid positioning device is hoisted to the corresponding position of the formwork, and the support leg pins of the base of the rigid positioning device are rigidly engaged with the reserved holes of the template. The laser holographic projector is activated to project a reference crosshair and coordinate grid onto the jig, guiding the pre-embedded bolts to align with the projection point. Simultaneously, the laser plumb bob is used to check the verticality deviation of the pre-embedded bolts, thus completing the reference coordinate projection operation.

3. The construction control method for precast simply supported beam embedded structures as described in claim 2, characterized in that, The rigid positioning device includes a multi-layer positioning plate and a horizontal bubble meter. The multi-layer positioning plate is provided with guide holes for the pre-embedded bolts to pass through. The step of guiding the embedded parts assembly to align with the reference coordinates for initial positioning after fixing the rigid positioning device to the template, and checking the positioning deviation in real time through the laser positioning system, further includes: The pre-embedded bolts are passed through the guide holes of the multi-layer positioning plate for positioning. The bubble level is adjusted to center the bubble using the bubble leveling device, so that the rigid positioning device is in a horizontal state.

4. The construction control method for precast simply supported beam embedded structures as described in claim 3, characterized in that, Before the steps of guiding the embedded parts assembly to align with the reference coordinates for initial positioning after the rigid positioning device is snapped and fixed to the template, and checking the positioning deviation in real time through the laser positioning system, the method further includes: The embedded steel plate is embedded in the positioning groove of the top layer of the rigid positioning device, and the embedded steel plate is spot welded to the top of the embedded bolt. The embedded steel plate is connected to the main reinforcement of the top plate steel reinforcement skeleton through the U-shaped slot on the side of the rigid positioning device. The rigid module is formed by using both high-strength wire binding and auxiliary spot welding for double fixing.

5. The construction control method for precast simply supported beam embedded structures as described in claim 4, characterized in that, When performing auxiliary spot welding for fixing, the number of weld points for any bolt shall not be less than 4, and the welding current shall not exceed 80A. The diameter of the high-strength binding wire is not less than 1.2 mm, and the construction torque is not less than 20 N·m.

6. The construction control method for precast simply supported beam embedded structures as described in any one of claims 1 to 5, characterized in that, The steps of performing concrete pouring operations, using the laser positioning system to perform real-time BIM model comparison and monitoring of the embedded component group according to a preset cycle, and completing the construction of the embedded structure when the comparison and monitoring results meet the third threshold include: The concrete pouring operation is carried out by layered pouring; wherein the thickness of each layer of concrete is not greater than 300mm, the pouring speed is not greater than 0.5m³ / min, and the distance between the vibrator and the outer wall of the rigid positioning device is not less than 150mm. The laser positioning system is used to perform three-dimensional coordinate scanning of the embedded parts group through the reserved scanning window on the top plate of the rigid positioning device at a preset cycle, and the data obtained from the scanning is compared with the BIM model in real time. When the deviation in any direction exceeds the third threshold, the feeding is paused and the deviation is corrected by the fine-tuning screw of the rigid positioning device.

7. The construction control method for precast simply supported beam embedded structures as described in claim 6, characterized in that, The preset period is to perform a comparison every ten minutes; the first threshold is 0.5mm, the second threshold has a mid-spacing deviation of 0.3mm and a height difference deviation of 0.2mm, and the third threshold is 0.5mm.

8. The construction control method for precast simply supported beam embedded structures as described in claim 7, characterized in that, The rigid positioning device is provided with quick-release pins on both sides; The steps of performing concrete pouring operations, using the laser positioning system to perform real-time BIM model comparison and monitoring of the embedded component group according to a preset cycle, and completing the construction of the embedded structure when the comparison and monitoring results meet a third threshold include: The rigid positioning device is pulled out as a whole by the quick-release pin, so that the embedded part group is permanently connected to the top plate steel reinforcement skeleton; After the rigid positioning device is removed, the laser positioning system is activated to perform a third BIM 3D model verification of the embedded parts group to ensure that the monitored structure meets the third threshold. When the precast simply supported box girder meets the preset strength, the formwork is removed.

9. The construction control method for precast simply supported beam embedded structures as described in claim 8, characterized in that, After the step of performing formwork removal when the precast simply supported box girder meets the preset strength, the method further includes: Using the scanning data from the total station combined with the laser positioning system, the current three-dimensional coordinates of the embedded parts group are compared and verified. The deviation data is then overlaid and compared with the BIM three-dimensional model to generate a visual deviation cloud map and archive it.

10. A construction control device for precast simply supported beam embedded structures, characterized in that, The method for controlling the construction of precast simply supported beam embedded structures as described in any one of claims 1 to 9.

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